Added an English description for the blue dragon scale mail 'Elemental of Ching-Rong...

Added an English description for the blue dragon scale mail 'Elemental of Ching-Rong'. It's an attempt to capture what I think is the intent of the Japanese description (as filtered through Google Translate) and is informed by the content at https://en.wikipedia.org/wiki/Azure_Dragon , https://en.wikipedia.org/wiki/White_Tiger_(mythology) , https://en.wikipedia.org/wiki/Black_Tortoise , and https://en.wikipedia.org/wiki/Vermilion_Bird .